Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d8121883a280334…

MALICIOUS

PDF

96.0 KB Created: 2021-03-19 03:40:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 02d27239125bd25609aa394a08dd93d5 SHA-1: 17f98c0a84f5b879fa18fbe4e647b37baebe507a SHA-256: 5d8121883a280334ebf603bb3ea28a0aff8ef11ac9c46b467f445efa7e655dc5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crophysi.ru/award?keyword=alphabet+english+letters+pdf PDF link annotation
    • https://jepukarebav.weebly.com/uploads/1/3/5/3/135321711/4cbb43.pdfIn PDF document text
    • https://wuvobarapupi.weebly.com/uploads/1/3/0/8/130813490/4159bf72756802.pdfIn PDF document text
    • https://zameleto.weebly.com/uploads/1/3/4/0/134042643/0695f4.pdfIn PDF document text
    • https://cdn.sqhk.co/segidexu/fhboARW/archery_tournaments_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/rje6Dje/vukitanu.pdfIn PDF document text
    • https://cdn.sqhk.co/belerudoxej/idtiijd/27183068469.pdfIn PDF document text
    • https://cdn.sqhk.co/numiwuzuwix/agjbQhj/dasizarobojujon.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/Ohcd2if/xewuj.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/Yyicihg/autonics_panel_meter.pdfIn PDF document text
    • https://suzazega.weebly.com/uploads/1/3/4/4/134476369/mogujagiwonegurowomi.pdfIn PDF document text
    • https://cdn.sqhk.co/rovonoset/lNnjeje/detention_center_las_vegas_nevada.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/ifODaij/pure_flix_on_roku_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/mizogujuzo/pijgDgi/my_movie_list_2019_malaysia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mogipegi/28249807981.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/jilanuvaxawumupivejekepa.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/84751261654.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/bimatuj.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/konizusaroxijifapukorat.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/fluorescence_quenching_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/56392308064.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/pinalaxuramoxiwamesi.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/17011264342.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/33579101223.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/upcoming_cookbooks_2020_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/sword_art_online_progressive_manga_reddit.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F5 5432 bytes
SHA-256: 2210082d5b31d28d15b76f16e8ad436697487c1bfc5867afa4a9dd89413ea7d4
font_01_sfnt_off00012662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12662 18000 bytes
SHA-256: 7392ccd3d27c81b836bd0fbdb7f4538057e7b8b602298f254efb100e94e0793a
font_02_sfnt_off00015cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CC5 16180 bytes
SHA-256: 0fea1f03a05bed2070d04b7fd3d80f50de856d9b1cfc9b64d29c31721fa91799

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